Variable controlling element



May 25-, 1926.

F. CARBENAY VARIABLE CONTROLLING ELEMENT Filed August 29 1921 2Sheets-Sheet 1 awwemtoz CARBENAY May 25 1926.

F. CARBENAY VARIABLE CONTROLLING ELEMENT Filed August 29, 1921 2Sheets-Sheet 2 avwemcoz FERNANU CARBENAY 3513 hi flue M401 Patented May25, 1926. I

UNITED STATES PATENT OFFICE.

FERNAND GARBENAY, PARIS, FRANCE.

VARIABLE CONTROLLING ELEMENT.

Applicatlcnjled August 29, 1921, Serial No. 496.541, and in France May8, 1920.

" series or insulate by'means of plugs or specially operated switches.Each section is composed of a certain number of divisions whlchcooperate with the controlling member, wiper or switch arm. Eachadjustment necessitates two successive operations; the operation of thewiper or the handle, and theoperation of the divider into sections.

The object of the present invention is to devise an arran ement in which.only the controlling mem er is operated to cut into service or divideinto sections the different parts of the inductance coil. Thearrangement is produced in such a manner that, in response to the normaloperation of the controlling member, a cam-like member having twoprojections is actuated to perform the function of the switch.

The invention will be more readily understood by reference to theenclosed drawings in which Fig. 1 represents the cam above referred to,and Fig. 2 represents the provision of such a cam in combination withthe other elements of an inductance that may be controlled by means of amultiposition switch.

Figures 3, 4 and 5 represent modified forms of my invention.

The special element F (Fig. 1) is preferably of copper or spring bronze,and is shaped like a clover leaf. Its thickness is usually equal orslightly greater than that of the movable wiper by means of which theswitch arm engages the terminals. Section B of this member is perforatedat A, and the member F may rotate around a screw passing through thishole. The corners of sections C. and D are suitably rounded and areconnected by means of a curved piece E. These sections perform thefunction of cams and contact making members.

The circuit arrangement and the oper ation ofthe sectional divider isillustrated in Fig. 2 showin the assembly of the apparatus. Theinductance L is divided for example, into three parts M, N, P. At acertain number of points, these parts are connected to the terminals 1,2, G 3, 4, 5,

6, G 7, 8, 9, arranged to be engaged by the arm Q, of the switch that isconnected to the outgoing terminal T of the apparatus. The incomingterminal T is connected with the end B of the inductance coil. In thismanner, a variable inductance is provided which has the special featurethat the outgoing ends of sections M and N are connected with terminalsC, and C respectively separated from terminals 3 and 7 which areconnected, respectively, with the incoming ends of the succeedingsections N and P. The special camsF and F" for automatically dividinginto sections, are provided near the terminals in such a manner that, inresponse to a certain angular displacement around their axis, the camsmay establish or break the connection between two sections of theinductance. I The axis of the cam is electrically connected with the incoming end of an inductancesection,"-whil e the part C or O is movedinto one of its positions in which it contacts with the terminalconnected to the outgoing endof the said section. The contact wiper ofthe switch moves the cam from one position into another. When the switchis moved from Oil left to right, it presses upwards the protheprojections O" and C are pushed back' and the unused sections of theinductance are automatically isolated.

These dead terminals-may be eliminated by covering with or constructingof insulating material one of the projections of the special cam. Theoutgoing end of one section is adapted to be connected with the terminalen aged by the conducting projection of t e cam, and the incoming end ofthe succeeding section is connected with a conducting portion of thecam, preferably its shaft.

It should be noted that, the cutting of the cams and the shaping of theends of the contact making rods or wipers must be such that one mayslide over the other with minimum friction. Furthermore, the cams mustbe secured in a manner to prevent free stops may be provided to limitthe angular movement of the cams.

Although in Fig. 2 an inductance is shown that is divided into threesections, obviously, the number of the sections may be increased at'will. Without departing from the spirit of the invention, the automaticsection divider may be made to operate in the above described mannerwithout the necessity of arranging theprojections C and B as contactmakers. One method of attaining this result is to arrange the cam asshown in Figure 3, wherein the arm 0 may be constructed ol" conductingmaterial and the arm D' of insulating material.

These projections could be arranged in different planes to be engaged bya suitable member the movement of which is controlled by the switch. Thecontact between the ter minal and the shaft or the body of the cam issecured through the agency of a wiper suitably mounted on the cam asshown in Figure 4, wherein the cam C is provided with a wiper arm WVadapted to make and break contact, which cam is controlled by aprojection 11 mounted on the wiper arm Q.

It should be noted also that this system is applicable also in casevariable inductances are controlled by a wiper having a rectilinearmovement as shown in Figure 5, wherein K and K represent adjacentsections of a coil, a variable amount of which is to be out in by theslider S operating on guide G. The slider S is provided with aprojection 11 which is arranged to operate the cam C. This system ofdividing into sections may be utilized also for other purposes thancontrolling variable inductances. It may be used in all cases where itis desired to divide into sections electrical circuits in re sponse tothe operation of a controlling switch.

Having described my invention, what I claim is:

1. A variable controlling element comprising a plurality of sections,said sections eing provided with a plurality of conne rting conductors,a regulating member for establishing contact with the terminal point sof said conductors, a member electrically connected to one end of aSBClZlOIl and having a portion adapted to contact with a terminal pointof another section, said member having a portion adapted to be engagedby the regulating member to electrically connect said sections togetherand disconnect them entirely from each other.

2. A variable electrical controlling element comprising a plurality ofsections, said sections being provided with a plurality of connectingconductors, a regulating member for establishing contact with theterminal points of said conductors, a pivoted cam electrically connectedto one end of a section, said cam hav ing an arm adapted to be engagedby said regulating member when moved in one directlon and a second armadapted to be engaged when'the regulating arm is moved in the oppositedirection.

3. A variable electrical controlling element comprising a plurality ofsections, said sections being provided with a plurality of connectingconductors, a regulating member for establishing contact with theterminal points of said conductors, a pivoted cam electrically connectedto one end of a section, said cam having an arm adapted to be enga gedby said regulating member when moved in one direction and a second armadapted to be engaged when the regulating arm is moved in the oppositedirection, one

of said arms being insulated and a con tact controlled by the movementof said cam adapted to engage a terminal of a second section to make orbreak connection between said sections connected with said cam.

FERNAND OARBENAY.

